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Old 06-22-2009, 10:30 AM
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Engine Help please

I have a 2001 X-10. When the boat is in neutral, the engine runs and rev's up fine. But once I put it in gear, and hit the throttle, it backfires and will only go about 5mph at full throttle. Does anyone have any ideas of what it might be? I have had it in the shop and still am having the same problem. Any help or suggestions would be greatly appreciated!
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Old 06-22-2009, 05:04 PM
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It also backfires... But there is a new fuel filter, so I am stumped to what could be wrong, maybe something electrical?
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Old 06-22-2009, 05:10 PM
bigmac bigmac is offline
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Join Date: Jun 2005
Boat: 2004 Maristar 230 VRS
Location: Central Minnesota
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Timing may be off. Another possibility is plug wires out of normal firing order.
'04 MariStar 230VRS/MCX
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Old 06-22-2009, 05:45 PM
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corey corey is offline
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Join Date: Oct 2005
Boat: X10
Location: MN
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Check the plugs and wires, my guess is one (or more) of them is bad.
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Old 06-23-2009, 01:20 PM
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MCVOLS MCVOLS is offline
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Join Date: Mar 2009
Boat: '08 X14 MCX Slot
Location: Southeast
Posts: 242
Had a similar problem after a tune up. Not as bad as yours sounds, but would backfire under a load. Idle was fine. Re-checked the 'new' plugs, and one was cracked. It got worse as we continued to run, I guess the crack got worse as it heated up. As mentioned, plugs/wires/timing sound like a logical starting spot.
2008 X-14 MCX
1993 Prostar 205
1982 S&S
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2001, mastercraft, x-10

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